import java.util.Scanner;

public class LotteryOdds {
    public static void main(String[] args){
        Scanner in=new Scanner(System.in);

        System.out.print("How many number do you need draw?");
        int k=in.nextInt();

        System.out.print("What is the higest number you can draw?");
        int n=in.nextInt();

        int lotteryOdds=1;
        for(int i=1;i<k;i++){
            lotteryOdds=lotteryOdds*(n-i+1)/i;
        }

        System.out.println("You odds are 1 in "+lotteryOdds+" .Good Luck!");
    }
}